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The challenge of rapidly and accurately assessing the potential acoustic scattering from bathymetric features requires a physics based solution to the rough surface scattering problem that captures the essential behavior of the scattering while still retaining a level of simplicity that allows for fast computation. A very common and simple geometric proxy (derived from the Kirchhoff approximation)...
Ocean analyses, forecasts and ensembles characterizing oceanographic uncertainty are becoming widely available. Acousticians are interested in the impacts of oceanographic variability (temporal and spatial) and uncertainty on acoustic propagation, however, it is very time consuming to compute acoustic propagation along many potential paths for multiple sensors, over a geographic area for many analysis...
A one-dimensional weakly-nonlinear model equation based on a Lagrangian-averaged Euler-α model of compressible flow in lossless fluids is presented. Traveling wave solutions (TWS)s, in the form of a topological soliton (or kink), admitted by this fourth-order partial differential equation are derived and analyzed. An implicit finite-difference scheme with internal iterations is constructed in order...
A numerical model to calculate the impulse response of a two-dimensional, impenetrable, rough surface directly in the time domain has been recently introduced [J. Acoust. Soc. Am. (2000) 107, 27]. This model is based on wedge diffraction theory and assumes that the half-space containing the source and receiver is homogeneous. In this work, the model is extended to handle media where the index of refraction...
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